March 21, 201313 yr I was just wondering if the number of drives affect the speed of the parity build and copy process. I have a Asus P5B mobo with the SuperMicro SAS MV8 controller and 12 drives in a Norco box. My 3TB parity drive is on the mobo SATA port. I always had performance issues (or perceived performance issues) where a copy of files (even internal with NC) is never higher than 20-30MB/s. The parity build on the other end goes to 70-80 MB/s. I am not using User Share and always copy directly to the drives (\\tower\disk1...etc.). I built another machine for testing (Asus mobo and only internal drives - yes I know it's generic - too lazy to open the box and look for exact model... but it's comparable to the other one) and it has only three drives. When I build parity, I hit 110-120MB/s. When I copy files I get 30-40 MB/s. It looks to me that the amount of drives does have an effect on speed and parity build. Am I right in my assumption, or are there other parameters to take into considerations. PS - I am using 5.0 Beta-13 (works well for now and is stable...), NICs are confirmed 1 GB, no user share, 4 GB of RAM on both boxes - no apparent errors in the logs Thanks for commenting on this.
March 21, 201313 yr The number of drives should not matter unless the bus is overloaded. The slowest drive will limit the speed.
Archived
This topic is now archived and is closed to further replies.